support derive

[yyy33]

Add derive macros for some commonly used trails like FromObject

Where set_emap is the function that I expose to the user lua user, wishing to receive the string or table type of the lua

fn set_emap(
    mode: Mode,
    lhs: ,
    rhs: ,
    opts: ,
) -> oxi::Result<()> {
    //TODO
}


#[derive(FromObject)]
enum Mode {
    ByString(String)
    ByTable(Dictionary)
}

[SCJangra]

Yea, derive macros would be great! In the meantime, I use this.

#[macro_export]
macro_rules! lua_interop {
    ($type:ty) => {
        impl nvim_oxi::conversion::FromObject for $type {
            fn from_object(object: nvim_oxi::Object) -> Result<Self, nvim_oxi::conversion::Error> {
                use nvim_oxi::serde::Deserializer;
                use serde::Deserialize;

                Self::deserialize(Deserializer::new(object)).map_err(Into::into)
            }
        }

        impl nvim_oxi::conversion::ToObject for $type {
            fn to_object(self) -> Result<nvim_oxi::Object, nvim_oxi::conversion::Error> {
                use nvim_oxi::serde::Serializer;
                use serde::Serialize;

                self.serialize(Serializer::new()).map_err(Into::into)
            }
        }

        impl nvim_oxi::lua::Poppable for $type {
            unsafe fn pop(
                lstate: *mut nvim_oxi::lua::ffi::lua_State,
            ) -> Result<Self, nvim_oxi::lua::Error> {
                use nvim_oxi::{conversion::FromObject, Object};

                let object = Object::pop(lstate)?;
                Self::from_object(object)
                    .map_err(nvim_oxi::lua::Error::pop_error_from_err::<Self, _>)
            }
        }

        impl nvim_oxi::lua::Pushable for $type {
            unsafe fn push(
                self,
                lstate: *mut nvim_oxi::lua::ffi::lua_State,
            ) -> Result<std::ffi::c_int, nvim_oxi::lua::Error> {
                use nvim_oxi::conversion::ToObject;

                self.to_object()
                    .map_err(nvim_oxi::lua::Error::push_error_from_err::<Self, _>)?
                    .push(lstate)
            }
        }
    };
}